Electrical apparatus for transmitting signals.



W AKEMANN.

ELECTRICAL APPARATUS FOR TRANSMITTING SIGNALS.

' APPLICATION FILED MAR. 9. 1915,

Patented Dec. 28, 1915.

UNITED STATES PATENT OFFICE.

WALTHER AKEMANN, OF ESSEN-ON-THE-RUHR, GERMANY, ASSIGNOR TO FRIED.

' KRUP]? AKTIENGESELZLSCHAFT, OF ESSEN-ON-THE-RUHR, GERMANY.'

ELECTRICAL APPARATUS FOR TRANSMITTING SIGNALS.

Application filed March 9, 1915.

provided with a reading device indicating the desired setting, and a setting device by means of which the desired setting, observed on the receiver, will be accomplished on the part to be adjusted, this setting being independent of the receiver.

Signal transmitting apparatus are known wherein the receiver is provided with a pointer, which, upon the setting of the transmitter, makes a corresponding deflection and returns to a fixed mark by the use of the setting device. Such signal transmitting apparatus provides a very convenient use of the setting device, as the reading is always done at the same place, and the operator never needs to note down the numbers, but these apparatus possess the disadvantage, that in all the receivers, the motor must be mounted on a movable part of the setting device,.or, if placed on a stationary part, must be provided with a special revolving-gearin or the like.

The object o the present invention is now to provide an electrical apparatus for transmitting signals of the kind referred to above, in which the service of the setting device is equally practicable as in the abovenamed apparatus, but which, however, is devoid of the enumerated disadvantages in said known apparatus.

In the accompanying drawing, one embodiment of this invention is illustrated and section of the electrically driven apparatus for transmitting signals, and Fig. 2, a diagrammatic top plan view of the same.

In the statlonary transmitter housing A are revolubly mounted two armatures B and C, one of which, B, serves to transmit a preliminary setting, and the other, C, to transmit the fine adjustment. Both armatures are provided with a common setting shaft D which is revoluble by means of a hand wheel d which has driving connection Specification of Letters Patent.

Patented Dec. 28, 1915.

Serial No. 13,228.

with the armature B through a worm gearing d b, and with the armature C by means of beveled gears d E, and a pair of spur gearsE 0 The two armatures B and C are each mounted on the shaft 6 and 0 respectively which projects through the cover a of the transmitter housing. At its free end the shaft 6 carries a graduated diskB provided with a scale 6 and the shaft 0 carries a graduated disk C having a scale 0 To read the scale 6 a fixed mark a is provided on the cover A and for reading the scale 0 a similarly arranged fixed mark a on the cover A I In the fixed receiver housing F are revolubly mounted two armatures G and H.

The armature G for the primary setting is in a well known manner connected with the transmitter armature B through a threephase conductor J and the armature H for the fine-setting system is connected with the transmitter armature C through a threephase conductor K. The two armatures G and H are respectively mounted on the shafts g and k which project through the cover F of the receiver housing F. The shaft 9 carries at its free end a graduated disk G provided with a scale 9 and the shaft k carries a graduated disk H provided with a scale 71.. For reading the scale g a fixed mark f is provided on the cover F of the housing F and for reading the scale h a mark i is similarly arranged on the cover F In the receiver housing F is moreover mounted the driving shaft M provided with a hand wheel at, and by means of which the desired setting may be accomplished of the part to be set, for instance, the sight carrier of a gun sighting device, this setting having been previously observed on the graduated disks G and H of the receiver. This setting device has a reading device with a graduated disk N for thekpreliminary setting and a graduated disk P for the fine setting. The graduated disk N provided with the scale a is mounted on the, free end of the shaft N projecting through the cover F, which shaft is mounted in such a manner in the housing F that the graduated disk N lies directly at the side of the graduated disk G The graduated disk P mounted on the shaft P and provided with a scale 12 is now arranged in an exactly similar manner relative to the graduated disk H The fixed mark f on the cover F belongs to the scale m and a fixed mark f belonging to the scale 12 is similarly situated on the cover F The two marks f and f are situated on the part of the cover F which lies between the graduated disk Gr and N and are connected to represent a double headed arrow. In exactly the same manner are the marks f and 7 arranged. I

The graduated disk N is in driving connection with the driving shaft M through the worm gearing m n and the graduated disk P' through the spur gears m Q Q W. The Worm gearing m n and d b possess the same ratio of transmission as does also the spur gears m Q Q i and d E E 0 Furthermore the graduateddisks N and G on the one hand, and the graduated disks P and H on the other hand, possess the same divisions and enumerations which is made possible by the above-named selection of the transmission ratio.

The use and operation of the described device need no further explanation.

It is also obvious that this device possesses considerable advantages over the onesdescribed in the beginning of'the specification.

I claim: f

In electrical apparatus for transmitting signals, a receiver with a reading device for indicating the desired setting and a setting device for setting the member to be adjusted to the setting observed on the'receiver, but independently of said receiver; said reading device comprising an armature and a movable graduated disk in driving connection therewith; said setting device comprising a movable graduated disk arranged adjacent to said first graduated disk, both of said disks being provided with identical graduation and numeration; said second graduated disk having driving connection with said member.

The foregoing specification signed at Barmen, Germany, this second day of February, 1915.

WALTHER AKEMANN. [LL s] In presence of- HELEN Norm, ALBERrNmR. 

